Privilege elevation via untrusted URL redirection
Published Apr 23, 2026 · Updated Apr 23, 2026
Open redirect in Microsoft 365 Copilot allows remote attackers to elevate privileges over a network after user interaction. Microsoft has not published the affected request handler, redirect parameter, or validation error that permits an untrusted destination. Exploitation requires a user to interact with attacker-controlled content; success exposes data and permits modifications outside Copilot's security scope.
Summary
What happened
Open redirect in Microsoft 365 Copilot allows remote attackers to elevate privileges over a network after user interaction. Microsoft has not published the affected request handler, redirect parameter, or validation error that permits an untrusted destination. Exploitation requires a user to interact with attacker-controlled content; success exposes data and permits modifications outside Copilot's security scope.
The record
- CVE
- CVE-2026-33102
- Published
- Apr 23, 2026
- Updated
- Apr 23, 2026
- Vendor
- Microsoft
- Product
- Microsoft 365 Copilot
- Classifications
- CWE-601, T1204.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 23, 2026CVE publishedPublication date reported by the CVE source.
- Apr 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=-
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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